CVE-2017-7269 Microsoft Internet Information Services (IIS): memory-safety flaw
In plain words: The program mishandles the memory it uses to keep track of data. A specially made input can scramble that memory. Usually lets an attacker crash the program or run their own code with its permissions.
Confirmed exploited by CISA on · US federal patch deadline May 3, 2022
What to do
- Install Microsoft's security update for Internet Information Services (IIS). If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic updates for the operating system and for Office, PDF and archive apps.
- Be careful with unexpected attachments — documents, .zip/.rar files and shortcuts are common bait.
- Use a normal (non-admin) account day to day and keep built-in protection like Microsoft Defender on.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Your files, saved passwords and accounts. Many of these let a program that is already running gain full administrator control.
The details
- Official name
- Microsoft Windows Server Buffer Overflow Vulnerability
- Product
- Microsoft Internet Information Services (IIS)
- CISA description
- Microsoft Windows Server 2003 R2 contains a buffer overflow vulnerability in Internet Information Services (IIS) 6.0 which allows remote attackers to execute code via a long header beginning with "If: <http://" in a PROPFIND request.
- Type of flaw
- Memory-safety flaw (CWE-119)
- Confirmed exploited
- Nov 3, 2021
- US federal patch deadline
- May 3, 2022
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Answering about CVE-2017-7269 ·
Questions about CVE-2017-7269
Is CVE-2017-7269 being exploited?
Yes. CISA added CVE-2017-7269 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2017-7269?
Install Microsoft's security update for Internet Information Services (IIS). If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic updates for the operating system and for Office, PDF and archive apps.
Am I affected by CVE-2017-7269?
Only if you use Microsoft Internet Information Services (IIS). This one is aimed at devices or apps of the kind people own.